all connect cable with 0.15sgmm and for main extension cable with 0.5sqmm 不懂呀

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allconnectcablewith0.15sgmmandformainextensioncablewith0.5sqmm不懂呀allconnectcablewith0.15sgmmandforma

all connect cable with 0.15sgmm and for main extension cable with 0.5sqmm 不懂呀
all connect cable with 0.15sgmm and for main extension cable with 0.5sqmm 不懂呀

all connect cable with 0.15sgmm and for main extension cable with 0.5sqmm 不懂呀
应该是sqmm
就是square millimeter
平方毫米的缩写
所有连接线采用截面积0.15平方毫米的缆线,主延长线缆采用截面积0.5平方毫米的缆线.